Voltage conversion circuit and image forming apparatus

2. The voltage conversion circuit according to claim 1, wherein a ripple removal characteristic of the LDO is set based on an operation frequency of the DC-DC converter.

3. The voltage conversion circuit according to claim 1, wherein the cut-off frequency of the low-pass filter is set based on an operation frequency of the DC-DC converter.

4. The voltage conversion circuit according to claim 1, wherein the low-pass filter is configured to reduce high-frequency noise that has not been removed by the LDO.

5. The voltage conversion circuit according to claim 1, wherein the low-pass filter is an LC filter.

8. The image forming apparatus according to claim 7, wherein the electronic circuit comprises one of an image processing unit, a hard drive, a processor, or a memory.